{"title":"Synchronous Machine Imitation Control of MMC Stations Adaptable for Both Strong and Weak Grids","authors":"Zheren Zhang;Hanlin Guo;Zheng Xu","doi":"10.1109/TPWRD.2025.3538914","DOIUrl":null,"url":null,"abstract":"A fast increasing proportion of renewable energy is the main development trend in today's power systems. The modular multilevel converter (MMC) station adaptable for both strong and weak grids is a potential solution when connecting to AC grids with a high proportion of power electronics. In this paper, a synchronous machine imitation control scheme of the MMC stations is proposed. The proposed control scheme consists of the basic control for normal operation and the additional control for AC fault riding through. With the basic control, the MMC station behaves as a synchronous machine. Then, based on small disturbance stability analysis, the low frequency damping characteristics are analyzed, demonstrating the proposed control's adaptability to both strong and weak grids under small disturbance. For the additional control, its performance under large disturbance is studied by time domain simulation. The time domain simulations are carried out in PSCAD/EMTDC for both the weak and strong grids, and the feasibility of the additional control under AC fault is also verified.","PeriodicalId":13498,"journal":{"name":"IEEE Transactions on Power Delivery","volume":"40 2","pages":"912-926"},"PeriodicalIF":3.7000,"publicationDate":"2025-02-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"IEEE Transactions on Power Delivery","FirstCategoryId":"5","ListUrlMain":"https://ieeexplore.ieee.org/document/10874223/","RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"ENGINEERING, ELECTRICAL & ELECTRONIC","Score":null,"Total":0}
引用次数: 0
Abstract
A fast increasing proportion of renewable energy is the main development trend in today's power systems. The modular multilevel converter (MMC) station adaptable for both strong and weak grids is a potential solution when connecting to AC grids with a high proportion of power electronics. In this paper, a synchronous machine imitation control scheme of the MMC stations is proposed. The proposed control scheme consists of the basic control for normal operation and the additional control for AC fault riding through. With the basic control, the MMC station behaves as a synchronous machine. Then, based on small disturbance stability analysis, the low frequency damping characteristics are analyzed, demonstrating the proposed control's adaptability to both strong and weak grids under small disturbance. For the additional control, its performance under large disturbance is studied by time domain simulation. The time domain simulations are carried out in PSCAD/EMTDC for both the weak and strong grids, and the feasibility of the additional control under AC fault is also verified.
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The scope of the Society embraces planning, research, development, design, application, construction, installation and operation of apparatus, equipment, structures, materials and systems for the safe, reliable and economic generation, transmission, distribution, conversion, measurement and control of electric energy. It includes the developing of engineering standards, the providing of information and instruction to the public and to legislators, as well as technical scientific, literary, educational and other activities that contribute to the electric power discipline or utilize the techniques or products within this discipline.
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